Team Win Recovery Project! It is really great in a lot of ways, see for yourself. Lots of features not in CWR and a much more intuitive interface. Initial release had a few bugs in in but those have all been ironed out by now it seems.
You can choose your device and download here:
Full directory of releases here, latest is 2.1.2:
It integrates nicely(and can be installed from) the goomanager beta app
Keep in mind that any backups from CWR are incompatible with this and vice versa. You can hang on to them and always re-flash CWR if you'd like, otherwise you need to restore them, change recoveries, and re-backup.
My favorite things about it are fast backup/restore time (~3 min) and ability to queue multiple zips for flashing.